code: def next(self, data):
      pass
  
file_path: backtrader/backtrader/flt.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from .metabase import MetaParams
  from .utils.py3 import with_metaclass
label_desc: Use image node_id 4 for calling the Filter obj's underlying member method code with example usage: obj.next(data) without return types